<?php
$weekday = 3;
if ($weekday == 1) {
    echo "今天是周一";
} elseif ($weekday == 2) {
    echo "今天是周二";
} elseif ($weekday == 3) {
    echo "今天是周三";
} elseif ($weekday == 4) {
    echo "今天是周四";
} elseif ($weekday == 5) {
    echo "今天是周五";
} elseif ($weekday == 6) {
    echo "今天是周六还是要上班";
} else
    echo "今天是美好的周末，但是美好的，总是短暂的！";